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<TITLE>[Chapter 18] 18.53 java.awt.ScrollPane (JDK 1.1)</TITLE>
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<DIV CLASS=sect1>
<h2 CLASS=sect1><A CLASS="TITLE" NAME="JNUT2-CH-18-SECT-53">18.53 java.awt.ScrollPane (JDK 1.1)</A></h2>

<DIV CLASS=sect2>
<h3 CLASS=sect2><A CLASS="TITLE" NAME="JNUT2-CH-18-SECT-53.1"></A></h3>
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<P CLASS=para>
This <tt CLASS=literal>Container</tt> class creates horizontal and
vertical scrollbars surrounding a "viewport" and allows a
single child component to be displayed and scrolled within
this viewport.  Typically the child of the
<tt CLASS=literal>ScrollPane</tt> is larger than the
<tt CLASS=literal>ScrollPane</tt> itself, so scrollbars allow the user to
select the currently visible portion.

<P CLASS=para>
When you call the <tt CLASS=literal>ScrollPane()</tt> constructor, you may
optionally specify a scrollbar display policy, which should
be one of the three constants defined by this class.  If you
do not specify a policy, <tt CLASS=literal>ScrollPane</tt> uses the
<tt CLASS=literal>SCROLLBARS_AS_NEEDED</tt> policy.

<P CLASS=para>
A program can programmatically scroll the child within the
viewport by calling <tt CLASS=literal>setScrollPosition()</tt>.
<tt CLASS=literal>getHAdjustable()</tt> and <tt CLASS=literal>getVAdjustable()</tt> return
the horizontal and vertical <tt CLASS=literal>Adjustable</tt> objects that
control scrolling (typically these are not actually
instances of <tt CLASS=literal>Scrollbar</tt>).  You can use these
<tt CLASS=literal>Adjustable</tt> objects to specify the unit and block
increment values for the scrollbars. You can also
directly set the <tt CLASS=literal>Adjustable</tt> value, as an alternative
to <tt CLASS=literal>setScrollPosition()</tt>, but should not set other
values of the <tt CLASS=literal>Adjustable</tt> objects.

<P CLASS=para>
Use <tt CLASS=literal>setSize()</tt> to set the size of the
<tt CLASS=literal>ScrollPane</tt> container.  You may want to take the size
of the scrollbars into account when computing the overall
container size--use <tt CLASS=literal>getHScrollbarHeight()</tt> and
<tt CLASS=literal>getVScrollbarWidth()</tt> to obtain these values.

<P CLASS=para>
<tt CLASS=literal>ScrollPane</tt> overrides the <tt CLASS=literal>printComponents()</tt>
method of <tt CLASS=literal>Container</tt> so that when a
<tt CLASS=literal>ScrollPane</tt> is printed, the entire child component is
printed, rather than only the currently visible portion.

<DIV CLASS=screen>
<P>
<PRE>
public class <tt CLASS=literal>ScrollPane</tt> extends Container {
    // <tt CLASS=literal>Public Constructors</tt>
            public <tt CLASS=literal>ScrollPane</tt>();
            public <tt CLASS=literal>ScrollPane</tt>(int <tt CLASS=literal>scrollbarDisplayPolicy</tt>);
    // <tt CLASS=literal>Constants</tt>
            public static final int <tt CLASS=literal>SCROLLBARS_ALWAYS</tt>;
            public static final int <tt CLASS=literal>SCROLLBARS_AS_NEEDED</tt>;
            public static final int <tt CLASS=literal>SCROLLBARS_NEVER</tt>;
    // <tt CLASS=literal>Public Instance Methods</tt>
            public void <tt CLASS=literal>addNotify</tt>();  //<tt CLASS=literal> Overrides Container</tt>
            public void <tt CLASS=literal>doLayout</tt>();  //<tt CLASS=literal> Overrides Container</tt>
            public Adjustable <tt CLASS=literal>getHAdjustable</tt>();
            public int <tt CLASS=literal>getHScrollbarHeight</tt>();
            public Point <tt CLASS=literal>getScrollPosition</tt>();
            public int <tt CLASS=literal>getScrollbarDisplayPolicy</tt>();
            public Adjustable <tt CLASS=literal>getVAdjustable</tt>();
            public int <tt CLASS=literal>getVScrollbarWidth</tt>();
            public Dimension <tt CLASS=literal>getViewportSize</tt>();
        #   public void <tt CLASS=literal>layout</tt>();  //<tt CLASS=literal> Overrides Container</tt>
            public String <tt CLASS=literal>paramString</tt>();  //<tt CLASS=literal> Overrides Container</tt>
            public void <tt CLASS=literal>printComponents</tt>(Graphics <tt CLASS=literal>g</tt>);  //<tt CLASS=literal> Overrides Container</tt>
            public final void <tt CLASS=literal>setLayout</tt>(LayoutManager <tt CLASS=literal>mgr</tt>);  //<tt CLASS=literal> Overrides Container</tt>
            public void <tt CLASS=literal>setScrollPosition</tt>(int <tt CLASS=literal>x</tt>, int <tt CLASS=literal>y</tt>);
            public void <tt CLASS=literal>setScrollPosition</tt>(Point <tt CLASS=literal>p</tt>);
    // <tt CLASS=literal>Protected Instance Methods</tt>
            protected final void <tt CLASS=literal>addImpl</tt>(Component <tt CLASS=literal>comp</tt>, Object <tt CLASS=literal>constraints</tt>, int <tt CLASS=literal>index</tt>);  //<tt CLASS=literal> Overrides Container</tt>
}
</PRE>
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<DIV CLASS=sect2>
<h3 CLASS=sect2><A CLASS="TITLE" NAME="JNUT2-CH-18-SECT-53.2">Hierarchy:</A></h3>

<P CLASS=para>
<tt CLASS=literal>Object->Component(ImageObserver, MenuContainer, Serializable)->Container->ScrollPane</tt>

</DIV>

<DIV CLASS=sect2>
<h3 CLASS=sect2><A CLASS="TITLE" NAME="JNUT2-CH-18-SECT-53.3">Passed To:</A></h3>

<P CLASS=para>
<tt CLASS=literal>Toolkit.createScrollPane()</tt>

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